Hopper position detection device utilizing negative pressure

Abstract

The invention belongs to the technical field of hopper negative pressure detection, and discloses a hopper position detection device using negative pressure, which comprises a hopper and a fixed support, a fixed frame is fixedly mounted in the hopper, a mounting plate is movably mounted in the fixed frame, and a special joint is fixedly mounted on the back of the mounting plate. Compared with a traditional device, the device has the advantages that the positioning block, the spring and the pull rod are matched, so that a pressure transmitter chip can be conveniently mounted in the hopper, a threaded transmission and axial feeding composite structure is adopted, the wiring board and a special joint are spirally matched, so that the displacement precision of the chip reaches the micron level, and the mounting and positioning accuracy is remarkably improved; and secondly, a dual-mode locking mechanism is innovated, a pull rod is used for pulling a positioning block to be extruded by a spring in a conical cavity to generate radial deformation, double guarantees of conical surface self-locking and mechanical interlocking are formed, and the vibration resistance is improved compared with a traditional device.

Description

Technical Field

[0001] This invention belongs to the field of hopper negative pressure detection technology, specifically a hopper position detection device that utilizes negative pressure. Background Technology

[0002] A hopper level detection device utilizing negative pressure is an automated detection equipment designed based on the principle of negative pressure, used for real-time monitoring and control of the height or position of materials within the hopper. This device senses changes in air pressure (i.e., negative pressure changes) caused by variations in material height within the hopper, converting this physical quantity into an electrical signal. After processing and analysis, the device displays the material height information intuitively, thereby achieving precise detection and control of the material position within the hopper. While traditional hopper structures achieve basic unloading functions through a bottom outlet and adjustable valve in conjunction with a belt conveyor, their material settling characteristics lead to a core defect: uneven settling within the material layer due to frictional differences easily causes localized arching and blockage or sudden material surges; simultaneously, the flow velocity is strongly correlated with the material level height—at high levels, gravitational potential energy accelerates material flow, while at low levels, pressure attenuation leads to velocity attenuation. This passive response mechanism results in flow rate fluctuations exceeding 30%. In precision control scenarios such as cement homogenization, chemical batching, metallurgical sintering, ceramic powder preparation, grain storage and bulk material transportation, traditional structures are difficult to meet dynamic metering requirements. In particular, when handling micron-sized powders or wet bulk materials, fluidization instability will exacerbate metering errors. Summary of the Invention

[0003] The purpose of this invention is to provide a hopper position detection device that utilizes negative pressure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a hopper position detection device using negative pressure, comprising a hopper and a fixed bracket, wherein a fixed frame is fixedly installed inside the hopper, an mounting plate is movably installed inside the fixed frame, a special connector is fixedly installed on the back of the mounting plate, a wiring plate is threaded into the internal part of the special connector, and a pressure transmitter chip is fixedly installed inside the wiring plate.

[0005] A housing is fixedly installed on the left side of the fixed frame. A positioning hole is movably installed inside the mounting plate. A positioning block is movably installed inside the positioning hole. A pull rod is fixedly installed at one end of the positioning block, and one end of the pull rod passes through the inside of the housing. A spring is fixedly installed between the positioning block and the housing.

[0006] Preferably, a discharge bin is fixedly installed at the bottom of the hopper, a auger is movably installed inside the discharge bin, and both ends of the auger penetrate through the interior of the discharge bin; a one-way valve is fixedly installed inside the discharge bin.

[0007] A second motor is fixedly installed on the left side of the discharge bin. A drive gear is fixedly installed on the output end of the second motor, and the driven gear meshes with the drive gear. A driven gear is fixedly installed on one end of the auger, and the driven gear meshes with the drive gear. A discharge port is fixedly installed at the bottom of the discharge bin.

[0008] Preferably, a first motor is fixedly mounted on the front of the fixed bracket, a first rotating shaft is fixedly mounted on the output end of the first motor, and one end of the first rotating shaft passes through the interior of the fixed bracket. A drive wheel is fixedly mounted on one end of the first rotating shaft. A second rotating shaft is movably mounted inside the fixed bracket, and one end of the second rotating shaft passes through the interior of the fixed bracket. A conveyor belt is drivingly connected between the first rotating shaft and the second rotating shaft. A driven wheel is fixedly mounted on one end of the second rotating shaft, and a transmission belt is drivingly connected between the driven wheel and the drive wheel.

[0009] Preferably, a push rod is fixedly mounted on the top of the mounting plate, and the outer surface of the push rod has a U-shaped form.

[0010] Preferably, a support plate is fixedly installed at the bottom of the hopper, and a fixing plate is fixedly installed between the two support plates.

[0011] Preferably, a reinforcing rib is provided for the transmission connection between the fixed plate and the support plate, and the reinforcing rib is triangular in shape.

[0012] Preferably, a fixing seat is fixedly installed on the back of the support plate, a fixing block is movably installed inside the fixing seat, and a working box is fixedly installed on the back of the fixing block.

[0013] Preferably, a support base is fixedly installed on the left side of the discharge hopper, and the interior of the support base has a U-shaped form.

[0014] Preferably, the inner diameter of the fixing seat is equal to the outer diameter of the fixing block, and the interior of the fixing seat has a smooth surface design.

[0015] Preferably, an inclined plate is fixedly installed inside the fixed bracket, and the inclined plate has an inclination angle of fifteen degrees.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. Compared with traditional devices, this invention facilitates the installation of pressure transmitter chips inside the hopper through the cooperation of positioning blocks, springs, and pull rods. It employs a composite structure of threaded drive and axial feed, with the helical engagement of the terminal block and dedicated connector ensuring chip displacement accuracy down to the micrometer level, significantly improving installation positioning accuracy. Secondly, it innovates a dual-modal locking mechanism, utilizing the pull rod to pull the positioning block within the conical cavity, causing radial deformation under spring compression. This creates a dual guarantee of conical self-locking and mechanical interlocking, improving vibration resistance compared to traditional devices. More importantly, the modular quick-installation structure allows for single-person handheld operation, completing complex assembly processes in just two steps: "push in" and "release," significantly improving installation efficiency. This design, through the integration of precision mechanical linkage and rapid locking technology, ensures installation accuracy while greatly reducing operational difficulty and maintenance costs, making it particularly suitable for precision instrument assembly scenarios in confined spaces.

[0018] 2. Compared with traditional devices, this invention facilitates the rotation of the auger inside the discharge hopper through the cooperation between the drive gear and the driven gear, allowing the material to be slowly discharged through the discharge port. The entire process is integrated with a fully automated control system, using a pressure transmitter to monitor material level changes in real time and automatically linking the opening and closing of the one-way valve and the gear drive module, significantly reducing manual operation and improving ease of operation. Secondly, the use of a double-gear precision meshing transmission structure ensures stable power transmission, and the uniform rotation design of the auger blades achieves precise material pushing, completely solving the technical problems of material blockage and bridging that are prone to occur in traditional devices. More importantly, the innovative integration of a negative pressure compensation mechanism and a spiral unloading process automatically maintains the dynamic balance of air pressure in the hopper during the material emptying stage, ensuring the stability of continuous production and effectively preventing dust leakage through sealed conveying, providing dual protection for a safe and clean working environment.

[0019] 3. Compared with traditional devices, this invention adopts a motor-driven dual-rotating-shaft structure. The first and second rotating shafts operate in tandem, ensuring stable rotation of the conveyor belt and significantly improving material conveying efficiency. Secondly, the synchronous transmission system of drive wheel-conveyor belt-driven wheel effectively reduces power loss, lowers energy consumption, and makes operating costs more economical. Furthermore, the design of the rotating mechanism embedded in the fixed bracket makes the equipment structure more compact, reducing the footprint and greatly improving maintenance convenience. In addition, the dual-shaft support structure enhances the balance of belt operation, significantly reducing the failure rate and extending the service life of the equipment. Finally, the fully automated conveying process enables continuous operation. Combined with the intelligent speed control system, the conveying rate can be precisely adjusted according to the material characteristics, expanding the applicability to the processing of various types of materials such as bulk materials and block materials, demonstrating significant comprehensive performance advantages. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the front three-dimensional appearance structure of the present invention;

[0021] Figure 2 This is a side perspective view of the present invention.

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the transport belt of the present invention;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the transmission belt of the present invention;

[0024] Figure 5 This is a schematic diagram of the cross-sectional structure of the jiaolong (dragon) of the present invention;

[0025] Figure 6 This is a schematic diagram of the cross-sectional structure of the fixed frame of the present invention;

[0026] Figure 7 This is an exploded view of the mounting plate of the present invention;

[0027] Figure 8 This is a schematic diagram of the fixed frame structure of the present invention;

[0028] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point A in the middle.

[0029] In the diagram: 1. Hopper; 2. Fixed bracket; 3. Support plate; 4. Discharge port; 5. Conveyor belt; 6. First motor; 7. Reinforcing rib; 8. Fixed plate; 9. Fixed seat; 10. Fixed block; 11. Working box; 12. Discharge bin; 13. Fixed frame; 14. First rotating shaft; 15. Drive wheel; 16. Conveyor belt; 17. Second rotating shaft; 18. Support seat; 19. Driven wheel; 20. One-way valve; 21. Auger; 22. Driven gear; 23. Drive gear; 24. Second motor; 25. Mounting plate; 26. Special connector; 27. Terminal block; 28. Pressure transmitter chip; 29. ​​Push rod; 30. Positioning hole; 31. Box body; 32. Pull rod; 33. Positioning block; 34. Spring; 35. Inclined plate. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figures 1 to 9As shown, this embodiment of the invention provides a hopper position detection device using negative pressure, including a hopper 1 and a fixed bracket 2. A fixed frame 13 is fixedly installed inside the hopper 1. An mounting plate 25 is movably installed inside the fixed frame 13. A special connector 26 is fixedly installed on the back of the mounting plate 25. A wiring board 27 is threaded inside the special connector 26. A pressure transmitter chip 28 is fixedly installed inside the wiring board 27.

[0032] A housing 31 is fixedly installed on the left side of the fixed frame 13. A positioning hole 30 is movably installed inside the mounting plate 25. A positioning block 33 is movably installed inside the positioning hole 30. A pull rod 32 is fixedly installed at one end of the positioning block 33, and one end of the pull rod 32 passes through the inside of the housing 31. A spring 34 is fixedly installed between the positioning block 33 and the housing 31.

[0033] The operator needs to install the pressure transmitter chip 28 inside the hopper 1. First, slowly screw the terminal block 27 into the special connector 26. The terminal block 27 drives the pressure transmitter chip 28 to move synchronously. Then, hold the pull rod 32 and pull the drive gear 23 to move it to one side of the housing 31 inside the fixed frame 13. The positioning block 33 compresses the spring 34 inside the housing 31, causing the positioning block 33 to pass through the fixed frame 13 and enter the housing 31. Next, hold the push rod 29 and slowly insert the mounting plate 25 into the drive gear 23. The mounting plate 25 drives the special connector 26 and the terminal block 27 to move synchronously. When the mounting plate 25 is completely inside the fixed frame 13, release the pull rod 32. The spring 34 compresses the positioning block 33 inside the housing 31, causing the positioning block 33 to pass through the fixed frame 13 and enter the positioning hole 30, thus completing the installation of the pressure transmitter chip 28 inside the hopper 1.

[0034] When installing the pressure transmitter chip 28 inside the hopper 1, the wiring board 27 must first be slowly screwed into the special connector 26. The threaded drive will cause the pressure transmitter chip 28 to move synchronously to the preset position. Then, the pull rod 32 is held to pull the positioning block 33 axially, causing it to move horizontally towards the end of the housing 31 within the guide channel of the fixed frame 13. Simultaneously, the positioning block 33 is driven to undergo radial deformation under the pressure of the spring 34 within the conical cavity of the housing 31, forcing it to penetrate the limiting hole on the side wall of the fixed frame 13 and embed into the locking groove of the housing 31. At this point, the mounting plate 25 is vertically inserted into the positioning hole of the fixed frame 13. The wedge-shaped mating surface pushes the special connector 26 and the wiring board 27 together for axial feeding. When the mounting plate 25 is completely submerged in the receiving cavity of the fixed frame 13, the pull rod 32 is released to reset the elastic element spring 34, causing it to be squeezed again, resulting in a secondary deformation that penetrates the side wall hole of the fixed frame 13. Finally, it is locked into the annular groove of the positioning hole 30, forming a mechanical interlock, completing the pressure... The precise assembly of the force transmitter chip 28 within the hopper 1, compared to traditional devices, utilizes the cooperation between the positioning block 33, spring 34, and pull rod 32 to facilitate the installation of the pressure transmitter chip 28 inside the hopper 1. Employing a composite structure of threaded drive and axial feed, the spiral engagement of the terminal block and dedicated connector ensures chip displacement accuracy down to the micrometer level, significantly improving installation positioning accuracy. Secondly, an innovative dual-modal locking mechanism utilizes the pull rod to pull the positioning block within the conical cavity, generating radial deformation under spring compression, forming a dual guarantee of conical self-locking and mechanical interlocking, improving vibration resistance compared to traditional devices. More importantly, the modular quick-assembly structure allows for single-person handheld operation, completing complex assembly processes in just two steps of "push-in" and "release," significantly improving installation efficiency. This design, through the integration of precision mechanical linkage and rapid locking technology, ensures installation accuracy while greatly reducing operational difficulty and maintenance costs, making it particularly suitable for precision instrument assembly scenarios in confined spaces.

[0035] This pressure transmitter chip system employs a customized design, with a core component being a P20 single-crystal silicon pressure core. Its range covers -10 to 250 kPa, and precision installation is achieved via a dedicated M20×1.5 external thread connector. This connector features a dual-specification internal thread structure: the larger end has an M20×1.5 internal thread for connection to the circuit board, while the smaller end has a 2-point imperial pipe thread, allowing for quick assembly of 2 to 6 quick-connect fittings as the air input channel. The chip output is converted by the circuit board's amplification circuit to output a standard 0–20 mA electrical signal, ensuring stable signal transmission.

[0036] The system integrates five logic control functions: 1. The DCS output module adopts a dual threshold judgment mechanism. When the detected pressure is ≤-1.0Pa, it automatically cuts off the signal output. When the pressure is ≥1.0Pa, it triggers a switch signal to connect to the DCS system in the control room. 2. The low material level indicator module adopts a dual-channel output design. When the pressure is ≤-1.0Pa, it synchronously lights up the external low material level indicator and maintains the signal on / off state. 3. The high material level indicator module activates the corresponding indicator when the pressure is ≥1.0Pa, forming a logical linkage with the DCS signal. 4. The pipeline monitoring module is equipped with a 5-second delay confirmation mechanism. After the purging signal is triggered, the pressure data is collected after a delay. When the pressure is ≤0.1Mpa, it continuously outputs a smooth signal and lights up the indicator device. 5. The blockage alarm module adopts the same delay logic. When the pressure is ≥0.1Mpa, the alarm indication is activated, forming a complete pipeline status monitoring system.

[0037] This system achieves deep integration of pressure monitoring and process control through modular design. It employs dual-threshold judgment to enhance signal anti-interference capabilities, and a delayed confirmation mechanism effectively avoids false alarms caused by transient pressure fluctuations. The combination of dedicated connectors and quick-connect interfaces balances ease of installation with reliable sealing. The high-precision characteristics of the monocrystalline silicon core ensure accurate measurement across a pressure range from -10 kPa negative to 250 kPa positive, making it particularly suitable for complex operating conditions requiring simultaneous monitoring of material level and pipeline patency.

[0038] This system adopts a modular design concept, integrating intelligent timing control and pulse signal switching functions. Core components are selected based on a ten-year lifespan. The timing module is equipped with an adjustable period timer, which triggers a pulse signal to start the solenoid valve every hour by default, executing a standardized 15-second purging procedure before automatically resetting. A 5-second pressure verification is performed after each purging start: when the detected pipeline pressure is ≤0.1 MPa, the unobstructed indicator light remains active; if the pressure is ≥0.1 MPa, the blockage alarm light illuminates. Both states are maintained until the start of the next cycle.

[0039] The pulse signal output unit adopts a dual-channel redundant design to achieve alternating acquisition of DCS signals from panels #1 and #2. The system cycles through the input signals in 3-second intervals: the first 3 seconds are dedicated to acquiring the output from panel #1; when a pressure ≥1.0Pa is detected, a switch signal is output to the control room; the following 3 seconds seamlessly switch to acquiring signals from panel #2. Parallel operation of the two channels is strictly prohibited. When the pressure is ≤-1.0Pa, the signal output is automatically masked to ensure that the DCS system only receives valid pressure data.

[0040] The equipment uses industrial-grade pluggable connectors, and all key parameters, including timing cycle, pressure threshold, and pulse width, can be adjusted in real time via a dual-screen human-machine interface on the front panel. The main display screen dynamically shows the current pressure value with a resolution of 0.01 kPa; the secondary screen synchronously displays the timer's operating status and supports switching between hour, minute, and second timing levels. The system has a built-in self-diagnostic function; when the pressure transmitter or solenoid valve malfunctions, it can automatically switch to the backup channel and trigger an audible and visual alarm. The entire unit uses an IP65-rated enclosure, and all connectors have passed a 1000-cycle plug-in / plug-out life test, making it particularly suitable for intelligent pressure monitoring and process control needs in continuous production scenarios.

[0041] Among them, a discharge bin 12 is fixedly installed at the bottom of the hopper 1, a auger 21 is movably installed inside the discharge bin 12, and both ends of the auger 21 penetrate through the interior of the discharge bin 12. A one-way valve 20 is fixedly installed inside the discharge bin 12.

[0042] A second motor 24 is fixedly installed on the left side of the discharge bin 12. A drive gear 23 is fixedly installed at the output end of the second motor 24, and the driven gear 22 meshes with the drive gear 23. A driven gear 22 is fixedly installed at one end of the auger 21, and the driven gear 22 meshes with the drive gear 23. A discharge port 4 is fixedly installed at the bottom of the discharge bin 12.

[0043] When the pressure transmitter chip 28 detects the pressure of the material inside the hopper 1, the operator opens the one-way valve 20, allowing the material to slowly enter the discharge hopper 12 through the one-way valve 20. Then, the second motor 24 is turned on, which drives the drive gear 23 to rotate. The drive gear 23 meshes with the driven gear 22, which in turn drives the driven gear 22 to rotate. The driven gear 22 then drives the auger 21 to rotate in the discharge hopper 12, causing the material in the discharge hopper 12 to slowly enter the discharge port 4, thereby reducing the negative pressure inside the hopper 1.

[0044] When the pressure transmitter chip 28 inside hopper 1 senses the material pressure, the operator activates the one-way valve 20, allowing the material to slowly flow into the discharge hopper 12. Then, the second motor 24 is started, driving the gear 23 to rotate. Through gear meshing, the driven gear 22 and the connected auger 21 rotate within the discharge hopper 12. The auger 21 pushes the material towards the outlet 4 and discharges it. As material continues to be output, the internal space of hopper 1 gradually releases, and the negative pressure is gradually reduced through airflow compensation, ultimately achieving pressure balance and stable unloading. Compared to traditional devices, this device, through the cooperation between the driving gear 23 and the driven gear 22, facilitates the rotation of the auger 21 inside the discharge hopper 12, allowing the material to pass through the discharge hopper. The material is slowly discharged from port 4. The entire process is integrated with a fully automated control system. The pressure transmitter monitors material level changes in real time and automatically controls the opening and closing of the one-way valve and the gear drive module, significantly reducing manual operation and improving ease of operation. Secondly, the double-gear precision meshing transmission structure ensures stable power transmission. Combined with the uniform rotation design of the auger blades, it achieves precise material pushing and completely solves the technical problems of material blockage and bridging that are common in traditional devices. More importantly, the innovative integration of negative pressure compensation mechanism and spiral unloading process automatically maintains dynamic balance of air pressure in the hopper during the material emptying stage. This ensures the stability of continuous production and effectively prevents dust leakage through sealed conveying, providing double protection for a safe and clean working environment.

[0045] The fixed bracket 2 has a first motor 6 fixedly mounted on its front side. The output end of the first motor 6 is fixedly mounted with a first rotating shaft 14, one end of which passes through the interior of the fixed bracket 2. A drive wheel 15 is fixedly mounted on one end of the first rotating shaft 14. A second rotating shaft 17 is movably mounted inside the fixed bracket 2, one end of which passes through the interior of the fixed bracket 2. A conveyor belt 5 is connected between the first rotating shaft 14 and the second rotating shaft 17. A driven wheel 19 is fixedly mounted on one end of the second rotating shaft 17, and a transmission belt 16 is connected between the driven wheel 19 and the drive wheel 15.

[0046] When the material falls into the conveyor belt 5 through the discharge port 4, the operator starts the first motor 6. The first motor 6 drives the first rotating shaft 14 to rotate inside the fixed bracket 2. The first rotating shaft 14 drives the drive wheel 15 to rotate. The drive wheel 15 drives the conveyor belt 16 and the driven wheel 19 to rotate synchronously. The driven wheel 19 drives the second rotating shaft 17 to rotate inside the fixed bracket 2. The rotation of the second rotating shaft 17 and the first rotating shaft 14 drives the conveyor belt 5 to rotate, thus conveying the material.

[0047] When material falls into the conveyor belt 5 through the discharge port 4, the first motor 6 is activated. The first motor 6 drives the first rotating shaft 14 to rotate inside the fixed bracket 2. The first rotating shaft 14 drives the drive wheel 15 to rotate, which in turn drives the conveyor belt 16 and the driven wheel 19 to rotate synchronously. The driven wheel 19 then drives the second rotating shaft 17 to rotate inside the fixed bracket 2. The rotation of the second rotating shaft 17 and the first rotating shaft 14 drives the conveyor belt 5 to rotate, thus transporting the material. Compared to traditional devices, this device adopts a motor-driven dual-rotating-shaft structure, with the first and second rotating shafts operating in tandem to ensure… The stable rotation of the conveyor belt significantly improves material conveying efficiency. Secondly, the synchronous transmission system of drive wheel-conveyor belt-driven wheel effectively reduces power loss, lowers energy consumption, and makes operating costs more economical. Thirdly, the design of the fixed bracket with an embedded rotating mechanism makes the equipment structure more compact, reducing the footprint and greatly improving maintenance convenience. Furthermore, the dual-shaft support structure enhances the balance of belt operation, significantly reducing the failure rate and extending the equipment's service life. Finally, the fully automated conveying process enables continuous operation, and with the intelligent speed control system, the conveying rate can be precisely adjusted according to material characteristics, expanding its applicability to various types of materials such as bulk and block materials, demonstrating significant comprehensive performance advantages.

[0048] Among them, a push rod 29 is fixedly installed on the top of the mounting plate 25, and the outer surface of the push rod 29 has a U-shaped form.

[0049] Since the outer surface of the push rod 29 has a U-shaped shape on the top of the mounting plate 25, and the U-shaped push rod 29 is ergonomic, it is easy for the staff to hold the push rod 29 and insert the mounting plate 25 into the interior of the fixing frame 13.

[0050] Among them, a support plate 3 is fixedly installed at the bottom of the hopper 1, and a fixing plate 8 is fixedly installed between the two support plates 3.

[0051] Since a fixing plate 8 is fixedly installed between the two support plates 3, the cooperation between the support plates 3 and the fixing plate 8 facilitates the support of the hopper 1, ensuring the stability of the pressure transmitter chip 28 inside the hopper 1 during use and improving the efficiency of the pressure transmitter chip 28.

[0052] Among them, the fixed plate 8 and the support plate 3 are connected by a reinforcing rib 7, and the reinforcing rib 7 is triangular in shape.

[0053] Because the reinforcing rib 7 is triangular in shape between the fixed plate 8 and the support plate 3, and because triangles have the characteristic of stability, the efficiency of the fixed plate 8 and the support plate 3 is improved during use.

[0054] Among them, a fixing seat 9 is fixedly installed on the back of the support plate 3, a fixing block 10 is movably installed inside the fixing seat 9, and a work box 11 is fixedly installed on the back of the fixing block 10.

[0055] By holding the work box 11, the fixing block 10 is slowly inserted into the fixing seat 9. The fixing seat 9 limits and fixes the fixing block 10. By adding the work box 11, it is convenient for the staff to take out and place maintenance tools inside the work box 11, and it is convenient to adjust the pressure transmitter chip 28 in a timely manner.

[0056] The left side of the discharge hopper 12 is fixedly equipped with a support base 18, and the inside of the support base 18 has a U-shaped form.

[0057] Since the inside of the support base 18 is U-shaped on the left side of the discharge hopper 12, and the inside of the support base 18 is in contact with the outer surface of the second motor 24, it is convenient to provide stable support for the second motor 24 and ensure the stability of the second motor 24 during use.

[0058] The inner diameter of the fixing seat 9 is equal to the outer diameter of the fixing block 10, and the interior of the fixing seat 9 has a smooth surface design.

[0059] Since the inner diameter of the fixing base 9 is equal to the outer diameter of the fixing block 10, and the interior of the fixing base 9 has a smooth surface design, it is easy to hold the work box 11 and slowly insert the fixing block 10 into the interior of the fixing base 9, thus ensuring the installation efficiency of the work box 11.

[0060] The fixed bracket 2 has an inclined plate 35 fixedly installed inside, and the inclined plate 35 has an inclination angle of fifteen degrees.

[0061] Since the fixed bracket 2 has an inclined plate 35 fixedly installed inside, and the inclined plate 35 has a 15-degree tilt angle, it is convenient to pour materials slowly into the designated position directly, ensuring the efficiency of material conveying.

[0062] Working principle and usage process:

[0063] The operator needs to install the pressure transmitter chip 28 inside the hopper 1. First, slowly screw the terminal block 27 into the special connector 26. The terminal block 27 drives the pressure transmitter chip 28 to move synchronously. Then, hold the pull rod 32 and pull the drive gear 23 to move it to one side of the housing 31 inside the fixed frame 13. The positioning block 33 compresses the spring 34 inside the housing 31, causing the positioning block 33 to pass through the fixed frame 13 and enter the housing 31. Next, hold the push rod 29 and slowly insert the mounting plate 25 into the drive gear 23. The mounting plate 25 drives the special connector 26 and the terminal block 27 to move synchronously. When the mounting plate 25 is completely inside the fixed frame 13, release the pull rod 32. The spring 34 compresses the positioning block 33 inside the housing 31, causing the positioning block 33 to pass through the fixed frame 13 and enter the positioning hole 30, thus completing the installation of the pressure transmitter chip 28 inside the hopper 1.

[0064] When the pressure transmitter chip 28 detects the pressure of the material inside the hopper 1, the operator opens the one-way valve 20, allowing the material to slowly enter the discharge hopper 12 through the one-way valve 20. Then, the second motor 24 is turned on, which drives the drive gear 23 to rotate. The drive gear 23 meshes with the driven gear 22, which in turn drives the driven gear 22 to rotate. The driven gear 22 then drives the auger 21 to rotate in the discharge hopper 12, causing the material in the discharge hopper 12 to slowly enter the discharge port 4, thereby reducing the negative pressure inside the hopper 1.

[0065] When the material falls into the conveyor belt 5 through the discharge port 4, the operator starts the first motor 6. The first motor 6 drives the first rotating shaft 14 to rotate inside the fixed bracket 2. The first rotating shaft 14 drives the drive wheel 15 to rotate. The drive wheel 15 drives the conveyor belt 16 and the driven wheel 19 to rotate synchronously. The driven wheel 19 drives the second rotating shaft 17 to rotate inside the fixed bracket 2. The rotation of the second rotating shaft 17 and the first rotating shaft 14 drives the conveyor belt 5 to rotate, thus conveying the material.

[0066] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0067] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hopper position detection device utilizing negative pressure, comprising a hopper (1) and a fixed support (2), characterized in that: A fixed frame (13) is fixedly installed inside the hopper (1). An installation plate (25) is movably installed inside the fixed frame (13). A special connector (26) is fixedly installed on the back of the installation plate (25). A wiring plate (27) is threaded inside the special connector (26). A pressure transmitter chip (28) is fixedly installed inside the wiring plate (27). A housing (31) is fixedly installed on the left side of the fixed frame (13). A positioning hole (30) is movably installed inside the mounting plate (25). A positioning block (33) is movably installed inside the positioning hole (30). A pull rod (32) is fixedly installed at one end of the positioning block (33), and one end of the pull rod (32) passes through the inside of the housing (31). A spring (34) is fixedly installed between the positioning block (33) and the housing (31).

2. The hopper position detection device utilizing negative pressure according to claim 1, characterized in that: The bottom of the hopper (1) is fixedly installed with a discharge chamber (12), and a auger (21) is movably installed inside the discharge chamber (12), with both ends of the auger (21) penetrating inside the discharge chamber (12). A one-way valve (20) is fixedly installed inside the discharge chamber (12). A second motor (24) is fixedly installed on the left side of the discharge bin (12). A drive gear (23) is fixedly installed at the output end of the second motor (24), and the driven gear (22) meshes with the drive gear (23). A driven gear (22) is fixedly installed at one end of the auger (21), and the driven gear (22) meshes with the drive gear (23). A discharge port (4) is fixedly installed at the bottom of the discharge bin (12).

3. The hopper position detection device utilizing negative pressure according to claim 1, characterized in that: A first motor (6) is fixedly installed on the front of the fixed bracket (2). A first rotating shaft (14) is fixedly installed at the output end of the first motor (6), and one end of the first rotating shaft (14) passes through the interior of the fixed bracket (2). A drive wheel (15) is fixedly installed at one end of the first rotating shaft (14). A second rotating shaft (17) is movably installed inside the fixed bracket (2), and one end of the second rotating shaft (17) passes through the interior of the fixed bracket (2). A conveyor belt (5) is connected between the first rotating shaft (14) and the second rotating shaft (17). A driven wheel (19) is fixedly installed at one end of the second rotating shaft (17), and a transmission belt (16) is connected between the driven wheel (19) and the drive wheel (15).

4. The hopper position detection device utilizing negative pressure according to claim 1, characterized in that: A push rod (29) is fixedly installed on the top of the mounting plate (25), and the outer surface of the push rod (29) presents a U-shaped form.

5. A hopper position detection device utilizing negative pressure according to claim 1, characterized in that: A support plate (3) is fixedly installed at the bottom of the hopper (1), and a fixing plate (8) is fixedly installed between the two support plates (3).

6. The hopper position detection device utilizing negative pressure according to claim 5, characterized in that: The fixed plate (8) and the support plate (3) are connected by a reinforcing rib (7), and the reinforcing rib (7) is triangular in shape.

7. A hopper position detection device utilizing negative pressure according to claim 5, characterized in that: A fixing seat (9) is fixedly installed on the back of the support plate (3), and a fixing block (10) is movably installed inside the fixing seat (9). A work box (11) is fixedly installed on the back of the fixing block (10).

8. A hopper position detection device utilizing negative pressure according to claim 2, characterized in that: A support base (18) is fixedly installed on the left side of the discharge hopper (12), and the interior of the support base (18) presents a U-shaped form.

9. A hopper position detection device utilizing negative pressure according to claim 7, characterized in that: The inner diameter of the fixing seat (9) is equal to the outer diameter of the fixing block (10), and the interior of the fixing seat (9) has a smooth surface design.

10. A hopper position detection device utilizing negative pressure according to claim 1, characterized in that: An inclined plate (35) is fixedly installed inside the fixed bracket (2), and the inclined plate (35) has an inclination angle of fifteen degrees.

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