Venturi dust collector

Abstract

The utility model discloses a kind of venturi dust collectors, including shell, air inlet pipeline, air outlet pipeline, variable diameter component and dust collecting pipeline;Air inlet pipeline, air outlet pipeline are symmetrically arranged in shell;Variable diameter component includes two groups of variable diameter unit, two groups of variable diameter unit are respectively installed in the end of air inlet pipeline and air outlet pipeline, and two groups of variable diameter unit are symmetrically arranged between air inlet pipeline and air outlet pipeline to form contraction section, variable diameter throat and expansion section, variable diameter unit includes outer ring frame, and several groups of variable diameter components are arranged on outer ring frame with equal interval in circumference;Dust collecting pipeline is fixed in one end of shell;Dust concentration monitoring system, dust concentration monitoring system is arranged in air inlet pipeline, and dust concentration monitoring system is connected with controller;Multiple water inlets are annularly provided in the inner wall of shell.The utility model breaks through the adaptability limitation of traditional fixed-caliber nozzle in the complex dust working condition under mine, by dynamically adjusting injection parameter, accurately matches the violent fluctuation of dust characteristics under mine, can save energy and reduce consumption, prolongs equipment service life.

Description

Technical Field

[0001] This utility model relates to the field of mining machinery, and in particular to a Venturi dust collector. Background Technology

[0002] The sources of dust in underground coal mines are complex, encompassing the entire process of mining, blasting, and transportation. Furthermore, the concentration and particle size fluctuate dramatically. During blasting operations, the instantaneous release of explosive energy carries away large amounts of coal and rock debris, forming a high-concentration coarse-particle dust stream, with concentrations potentially rising to several thousand mg / m³. 3 The particle size is mostly concentrated in the range of 10-50 μm; however, during normal mining or transportation operations, dust is mainly composed of low-concentration fine particles, with concentrations often maintained at tens to hundreds of mg / m³. 3 Of these, respirable dust (particle size ≤ 5μm) accounts for more than 60%, which poses the greatest risk.

[0003] Traditional mining venturi dust collectors, relying on the throttling atomization principle of the venturi tube, can efficiently capture respirable dust through the intense collision of high-speed airflow and water mist, and were once the mainstream equipment for dust removal in mines. However, due to the design flaw of the fixed-diameter nozzle, its processing capacity cannot be dynamically adjusted according to the dust conditions: when facing the high-load dust during blasting, the flow area and atomization intensity of the fixed nozzle are fixed, and it is impossible to improve the water mist coverage and capture capacity in time. As a result, a large number of dust particles are discharged without being fully purified, causing the dust concentration at the working surface to exceed the standard, increasing the risk of pneumoconiosis in miners and the hidden danger of equipment wear.

[0004] Based on the above-mentioned technical problems, this utility model provides a Venturi dust collector. Utility Model Content

[0005] The purpose of this invention is to provide a Venturi dust collector to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a Venturi dust collector, including a shell, a variable diameter component, an air inlet pipe, an air outlet pipe, and a dust collection pipe;

[0007] The air intake pipe and the air outlet pipe are symmetrically arranged inside the housing and are coaxially arranged with the housing.

[0008] The variable diameter component is disposed between the intake pipe and the outlet pipe. The variable diameter component includes two sets of variable diameter units, which are respectively installed at the ends of the intake pipe and the outlet pipe. The two sets of variable diameter units are symmetrically arranged between the intake pipe and the outlet pipe to form a contraction section, a variable diameter throat, and an expansion section. The variable diameter unit includes an outer ring frame, which is respectively fixed at the ends of the intake pipe and the outlet pipe. Several sets of variable diameter components are arranged circumferentially at equal intervals on the outer ring frame.

[0009] The dust collection pipe is fixed to the end of the outer shell and is arranged coaxially with the air outlet pipe. The dust collection pipe is connected to the inlet of the cyclone separator.

[0010] A dust concentration monitoring system, wherein the dust concentration monitoring system is arranged inside the housing and is connected to a controller;

[0011] The inner wall of the outer shell has several water inlet holes at equal intervals around its circumference. The water inlet holes are connected to water inlet pipes. A flow monitoring sensor and a flow valve are installed in the water inlet pipes. The flow monitoring sensor and the flow valve are connected to the dust concentration monitoring system.

[0012] According to the Venturi dust collector provided by this utility model, the variable diameter assembly includes:

[0013] The outer blade has an outer ring rocker arm rotatably connected to the outer ring frame, and one end of the outer ring rocker arm is rotatably connected to the end of the outer blade.

[0014] The inner blade is connected to the outer blade via a limiting component, and the outer blade and the inner blade are staggered. An inner ring rocker is rotatably connected to the outer ring frame, and the inner ring rocker is rotatably engaged with the inner blade.

[0015] An electrically controlled push rod is rotatably connected to the inner wall of the outer ring frame at the end with the larger diameter. The output end of the electrically controlled push rod is rotatably connected to the outer wall of the outer blade, and is used to adjust the expansion and contraction of the outer blade.

[0016] According to the Venturi dust collector provided by this utility model, the limiting component includes a limiting frame, which is fixed to the top surface of the inner blade and the limiting frame is in limiting cooperation with the top surface of the outer blade.

[0017] According to the Venturi dust collector provided by this utility model, an outer ring blade frame is fixedly connected to the outer ring frame, the outer ring rocker and the inner ring rocker are respectively rotatably connected to the outer ring frame through the outer ring blade frame, and a pull rod is rotatably connected to the outer ring blade frame connected to the outer ring rocker, and the pull rod is rotatably connected to the outer blade.

[0018] According to the Venturi dust collector provided by this utility model, a plurality of mounting seats are fixed on the inner wall of the outer ring frame, and the electrically controlled top rod is rotatably connected to the mounting seats.

[0019] According to the Venturi dust collector provided by this utility model, a drain pipe is installed at the rear end of the outer shell.

[0020] The present invention discloses the following technical effects:

[0021] The variable diameter adjustment function of this invention can be linked with a dust sensor and control system to form a complete control chain: the dust sensor monitors the dust concentration in the mine and feeds back a signal, and the control system drives the variable diameter component of the variable diameter unit to move, realizing a fully automatic closed-loop control of "dust concentration monitoring → signal feedback → motor drive → throat diameter adjustment → water inlet flow rate adjustment". This process does not require manual operation in dangerous areas of the mine, avoiding the safety risks and inefficiencies of manual adjustment. Moreover, due to the stable structure of the air inlet pipe, air outlet pipe and shell arranged coaxially, it can be directly integrated into the existing mine automation system without large-scale modification, fully meeting the development needs of modern mines for "less manpower and automation". Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the Venturi dust collector of the present invention;

[0024] Figure 2 This is a schematic diagram of the variable diameter assembly of the present invention;

[0025] Figure 3 This is a schematic diagram showing the contracted and expanded states of the variable diameter component of the present invention.

[0026] The components include: 1. outer casing; 2. variable diameter components; 3. air inlet pipe; 4. air outlet pipe; and 5. dust collection pipe.

[0027] 101. Water inlet; 102. Drain pipe;

[0028] 201. Outer ring frame; 202. Outer blade; 203. Outer ring rocker; 204. Inner blade; 205. Inner ring rocker; 206. Electrically controlled push rod; 207. Limiting frame; 208. Outer ring blade frame; 209. Mounting base. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Reference Figures 1-3 This utility model provides a Venturi dust collector, including a shell 1, a variable diameter component 2, an air inlet pipe 3, an air outlet pipe 4, and a dust collection pipe 5;

[0032] The air intake pipe 3 and the air outlet pipe 4 are symmetrically arranged inside the outer casing 1 and are coaxially arranged with the outer casing 1;

[0033] The variable diameter component 2 is disposed between the intake pipe 3 and the outlet pipe 4. The variable diameter component 2 includes two sets of variable diameter units, which are respectively installed at the ends of the intake pipe 3 and the outlet pipe 4. The two sets of variable diameter units are symmetrically arranged between the intake pipe 3 and the outlet pipe 4 to form a contraction section, a variable diameter throat and an expansion section. The variable diameter unit includes an outer ring frame 201, which is fixed at the ends of the intake pipe 3 and the outlet pipe 4. Several sets of variable diameter components are arranged circumferentially at equal intervals on the outer ring frame 201.

[0034] The dust collection pipe 5 is fixed to the end of the outer casing 1 and is arranged coaxially with the exhaust pipe 4. The dust collection pipe 5 is connected to the inlet of the cyclone separator.

[0035] A dust concentration monitoring system is installed inside the housing 1 and is connected to the controller.

[0036] The inner wall of the outer shell 1 has several water inlet holes at equal intervals around its circumference. The water inlet holes are connected to water inlet pipes. Flow monitoring sensors and flow valves are installed inside the water inlet pipes. The flow monitoring sensors and flow valves are connected to the dust concentration monitoring system.

[0037] Dust-laden airflow enters the dust collector through inlet pipe 3. Because inlet pipe 3 and outlet pipe 4 are symmetrically and coaxially arranged within the outer casing 1, the airflow can be stably transported along the axis to the variable diameter component 2 area. At this time, the control system monitors the dust concentration and particle size in the airflow in real time, providing a basis for variable diameter adjustment. The outer ring frame 201, fixed to the ends of inlet pipe 3 and outlet pipe 4, drives the circumferentially spaced variable diameter components to move synchronously. A high-pressure water source is connected to the water inlet hole on the outer casing 1, and the water is atomized into water mist through the nozzle. Under the Venturi effect, the high-speed airflow collides and entrains the water mist violently, and the dust is adsorbed by the water mist to form a dust-mist mixture, completing the initial capture. The dust-mist mixed airflow enters the dust collection pipe 5 along the axis and is then transported to the cyclone separator. Inside the cyclone separator, the mixed airflow undergoes circular motion, and dust particles settle to the bottom due to centrifugal force and are collected through the dust outlet; the purified gas is discharged from the exhaust port at the top of the cyclone separator, and some of the condensate can be recycled to achieve water resource recycling.

[0038] Further optimization of the scheme includes the following variable diameter components:

[0039] The outer blade 202 has an outer ring rocker 203 rotatably connected to the outer ring frame 201, and one end of the outer ring rocker 203 is rotatably connected to the end of the outer blade 202.

[0040] The inner blade 204 is connected to the outer blade 202 through a limiting component, and the outer blade 202 and the inner blade 204 are staggered. An inner ring rocker 205 is rotatably connected to the outer ring frame 201, and the inner ring rocker 205 is rotatably engaged with the inner blade 204.

[0041] The electrically controlled push rod 206 is rotatably connected to the inner wall of the outer ring frame 201 at the larger diameter end. The output end of the electrically controlled push rod 206 is rotatably connected to the outer wall of the outer blade 202 and is used to adjust the expansion and contraction of the outer blade 202.

[0042] It should be noted that the inner blades 204 and outer blades 202 of the two sets of variable diameter units are fixed one-to-one, and the intake pipe 3 slides relative to the outer shell 1. It can move with the variable diameter unit during the variable diameter process to avoid motion interference.

[0043] The electrically controlled push rod 206 is rotatably connected to the inner wall of the outer ring frame 201 at the larger diameter end via the mounting base 209. When the PLC control system receives the dust sensor signal, if the detected dust concentration is ≥

[1000] mg / m³, 3 The controller drives the output end of the electric control push rod to extend, applying a thrust to the outer wall of the outer blades. The outer blades rotate around the outer ring rocker arm and expand outward axially, causing the inner blades to expand synchronously. If the dust concentration is detected to be ≤

[300] mg / m³, 3The output end of the electrically controlled push rod retracts, pulling the outer blades inward to shrink the throat diameter, achieving a precise match between the diameter and dust concentration. The inner blade 204 is linked: the inner blade 204 is staggered with the outer blade 202 through a limiting component, and the inner blade 204 rotates in coordination with the inner ring rocker 205 on the outer ring frame 201. When the outer blade 202 retracts and expands, the limiting component drives the inner blade 204 to move synchronously, and the inner ring rocker 205 provides rotational support for the inner blade 204 to prevent blade deviation. The staggered and coordinated retraction and expansion of the outer blade 202 and the inner blade 204 make the contraction section, throat, and expansion section between the intake pipe 3 and the outlet pipe 4 form a smooth transition variable diameter channel, ensuring stable airflow in the throat and avoiding pressure loss or dust accumulation caused by sudden changes in the channel, ultimately achieving precise adjustment of the throat diameter as needed.

[0044] The scheme is further optimized. The limiting component includes a limiting frame 207, which is fixed on the top surface of the inner blade 204 and the limiting frame 207 is matched with the top surface of the outer blade 202 for limiting.

[0045] The limiting bracket 207 is fixed to the top surface of the inner blade 204, and its shape is adapted to the top surface contour of the outer blade 202, forming a rigid connection relationship of "inner blade 204-limiting bracket 207-outer blade 202". When the outer blade 202 retracts or expands under the drive of the electric control push rod 206, the limiting bracket 207 restricts the relative displacement of the inner blade 204 and the outer blade 202 by limiting the top surface of the outer blade 202, ensuring that the two always maintain the preset misalignment distance. Through the limiting constraint, the inner and outer blades 202 can change the throat diameter synchronously, and the misaligned blades can fill the gap when a single blade is adjusted, so that the inner wall of the throat always remains continuous and smooth, avoiding the generation of vortices in the airflow at the gap, and ensuring the stable performance of the Venturi effect.

[0046] In a further optimized design, an outer ring blade frame 208 is fixedly connected to the outer ring frame 201. The outer ring rocker 203 and the inner ring rocker 205 are rotatably connected to the outer ring frame 201 via the outer ring blade frame 208. A pull rod is rotatably connected to the outer ring blade frame 208 connected to the outer ring rocker 203, and the pull rod is rotatably connected to the outer blade 202.

[0047] To further optimize the design, several mounting seats 209 are fixed on the inner wall of the outer ring frame 201, and the electric control top rod 206 is rotatably connected to the mounting seats 209.

[0048] Further optimization of the design: a drain pipe 102 is installed at the rear end of the outer casing 1.

[0049] After high-pressure water mist is introduced into the water inlet of the outer casing 1, the water mist mixes with the dust to form a dust-mist mixture. Some of the excess water mist that does not participate in dust adsorption will accumulate at the bottom of the outer casing 1 or flow with the airflow to the rear end of the outer casing 1. The drain pipe at the rear end of the outer casing 1 is connected to the inside of the outer casing 1 and can discharge the accumulated water in a directional manner by gravity, so as to avoid the water from blocking the air intake / exhaust channels inside the outer casing 1 or seeping into the mine roadway and causing the "over-wet" problem. The discharged water can be filtered and returned to the water inlet, further reducing the consumption of mine water resources, which is in line with the "low energy consumption" design goal, while avoiding water corrosion of the inner wall of the outer casing 1 and extending the service life of the equipment.

[0050] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0051] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A Venturi dust collector, characterized in that, It includes a housing (1), a variable diameter component (2), an air inlet pipe (3), an air outlet pipe (4), and a dust collection pipe (5); The air inlet pipe (3) and the air outlet pipe (4) are symmetrically arranged inside the outer shell (1) and are coaxially arranged with the outer shell (1); The variable diameter component (2) is disposed between the air intake pipe (3) and the air outlet pipe (4). The variable diameter component (2) includes two sets of variable diameter units. The two sets of variable diameter units are respectively installed at the ends of the air intake pipe (3) and the air outlet pipe (4). The two sets of variable diameter units are symmetrically arranged between the air intake pipe (3) and the air outlet pipe (4) to form a contraction section, a variable diameter throat and an expansion section. The variable diameter unit includes an outer ring frame (201). The outer ring frame (201) is respectively fixed at the ends of the air intake pipe (3) and the air outlet pipe (4). Several sets of variable diameter components are arranged circumferentially at equal intervals on the outer ring frame (201). The dust collection pipe (5) is fixed to the end of the outer shell (1) and is arranged coaxially with the air outlet pipe (4). The dust collection pipe (5) is connected to the inlet of the cyclone separator. A dust concentration monitoring system is arranged inside the housing (1) and is connected to a controller; The outer shell (1) has several water inlet holes circumferentially spaced on its inner wall. The water inlet holes are connected to a water inlet pipe. A flow monitoring sensor and a flow valve are installed in the water inlet pipe. The flow monitoring sensor and the flow valve are connected to the dust concentration monitoring system.

2. A Venturi dust collector according to claim 1, characterized in that, The variable diameter assembly includes: The outer blade (202) has an outer ring rocker (203) rotatably connected to the outer ring frame (201), and one end of the outer ring rocker (203) is rotatably connected to the end of the outer blade (202). The inner blade (204) is connected to the outer blade (202) through a limiting component, and the outer blade (202) and the inner blade (204) are staggered. An inner ring rocker (205) is rotatably connected to the outer ring frame (201), and the inner ring rocker (205) is rotatably engaged with the inner blade (204). An electrically controlled push rod (206) is rotatably connected to the inner wall of the outer ring frame (201) at the end with the larger diameter. The output end of the electrically controlled push rod (206) is rotatably connected to the outer wall of the outer blade (202) for adjusting the expansion and contraction of the outer blade (202).

3. The Venturi dust collector according to claim 2, characterized in that, The limiting component includes a limiting frame (207), which is fixed to the top surface of the inner blade (204) and the limiting frame (207) is engaged with the top surface of the outer blade (202).

4. The Venturi dust collector according to claim 2, characterized in that, An outer ring blade frame (208) is fixedly connected to the outer ring frame (201). The outer ring rocker (203) and the inner ring rocker (205) are rotatably connected to the outer ring frame (201) through the outer ring blade frame (208). A pull rod is rotatably connected to the outer ring blade frame (208) connected to the outer ring rocker (203). The pull rod is rotatably connected to the outer blade (202).

5. The Venturi dust collector according to claim 2, characterized in that, A number of mounting seats (209) are fixed on the inner wall of the outer ring frame (201), and the electric control rod (206) is rotatably connected to the mounting seats (209).

6. The Venturi dust collector according to claim 1, characterized in that, A drain pipe (102) is installed at the rear end of the outer casing (1).

Images